*/
package org.opendaylight.controller.cluster.raft.behaviors;
-import com.google.protobuf.ByteString;
+import com.google.common.base.Throwables;
+import com.google.common.io.ByteSource;
+import java.io.IOException;
+import java.io.InputStream;
import java.util.Arrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Encapsulates the leader state and logic for sending snapshot chunks to a follower.
*/
-public final class LeaderInstallSnapshotState {
+public final class LeaderInstallSnapshotState implements AutoCloseable {
private static final Logger LOG = LoggerFactory.getLogger(LeaderInstallSnapshotState.class);
// The index of the first chunk that is sent when installing a snapshot
private final int snapshotChunkSize;
private final String logName;
- private ByteString snapshotBytes;
+ private ByteSource snapshotBytes;
private int offset = 0;
// the next snapshot chunk is sent only if the replyReceivedForOffset matches offset
private int replyReceivedForOffset = -1;
private int totalChunks;
private int lastChunkHashCode = INITIAL_LAST_CHUNK_HASH_CODE;
private int nextChunkHashCode = INITIAL_LAST_CHUNK_HASH_CODE;
+ private long snapshotSize;
+ private InputStream snapshotInputStream;
LeaderInstallSnapshotState(int snapshotChunkSize, String logName) {
this.snapshotChunkSize = snapshotChunkSize;
this.logName = logName;
}
- ByteString getSnapshotBytes() {
- return snapshotBytes;
- }
-
- void setSnapshotBytes(ByteString snapshotBytes) {
- if(this.snapshotBytes != null) {
+ void setSnapshotBytes(ByteSource snapshotBytes) throws IOException {
+ if (this.snapshotBytes != null) {
return;
}
+ snapshotSize = snapshotBytes.size();
+ snapshotInputStream = snapshotBytes.openStream();
+
this.snapshotBytes = snapshotBytes;
- int size = snapshotBytes.size();
- totalChunks = (size / snapshotChunkSize) + (size % snapshotChunkSize > 0 ? 1 : 0);
- LOG.debug("{}: Snapshot {} bytes, total chunks to send: {}", logName, size, totalChunks);
+ totalChunks = (int) (snapshotSize / snapshotChunkSize + (snapshotSize % snapshotChunkSize > 0 ? 1 : 0));
+
+ LOG.debug("{}: Snapshot {} bytes, total chunks to send: {}", logName, snapshotSize, totalChunks);
replyReceivedForOffset = -1;
chunkIndex = FIRST_CHUNK_INDEX;
}
int incrementOffset() {
- if(replyStatus) {
+ if (replyStatus) {
// if prev chunk failed, we would want to sent the same chunk again
offset = offset + snapshotChunkSize;
}
boolean canSendNextChunk() {
// we only send a false if a chunk is sent but we have not received a reply yet
- return snapshotBytes != null && replyReceivedForOffset == offset;
+ return snapshotBytes != null && (nextChunkHashCode == INITIAL_LAST_CHUNK_HASH_CODE
+ || replyReceivedForOffset == offset);
}
boolean isLastChunk(int index) {
}
}
- byte[] getNextChunk() {
- int snapshotLength = getSnapshotBytes().size();
+ byte[] getNextChunk() throws IOException {
int start = incrementOffset();
int size = snapshotChunkSize;
- if (snapshotChunkSize > snapshotLength) {
- size = snapshotLength;
- } else if ((start + snapshotChunkSize) > snapshotLength) {
- size = snapshotLength - start;
+ if (snapshotChunkSize > snapshotSize) {
+ size = (int) snapshotSize;
+ } else if (start + snapshotChunkSize > snapshotSize) {
+ size = (int) (snapshotSize - start);
}
byte[] nextChunk = new byte[size];
- getSnapshotBytes().copyTo(nextChunk, start, 0, size);
+ int numRead = snapshotInputStream.read(nextChunk);
+ if (numRead != size) {
+ throw new IOException(String.format(
+ "The # of bytes read from the input stream, %d, does not match the expected # %d", numRead, size));
+ }
+
nextChunkHashCode = Arrays.hashCode(nextChunk);
LOG.debug("{}: Next chunk: total length={}, offset={}, size={}, hashCode={}", logName,
- snapshotLength, start, size, nextChunkHashCode);
+ snapshotSize, start, size, nextChunkHashCode);
return nextChunk;
}
/**
- * reset should be called when the Follower needs to be sent the snapshot from the beginning
+ * Reset should be called when the Follower needs to be sent the snapshot from the beginning.
*/
- void reset(){
+ void reset() {
+ closeStream();
+
offset = 0;
replyStatus = false;
replyReceivedForOffset = offset;
chunkIndex = FIRST_CHUNK_INDEX;
lastChunkHashCode = INITIAL_LAST_CHUNK_HASH_CODE;
+
+ try {
+ snapshotInputStream = snapshotBytes.openStream();
+ } catch (IOException e) {
+ throw Throwables.propagate(e);
+ }
+ }
+
+ @Override
+ public void close() {
+ closeStream();
+ snapshotBytes = null;
+ }
+
+ private void closeStream() {
+ if (snapshotInputStream != null) {
+ try {
+ snapshotInputStream.close();
+ } catch (IOException e) {
+ LOG.warn("{}: Error closing snapshot stream", logName);
+ }
+
+ snapshotInputStream = null;
+ }
}
int getLastChunkHashCode() {